Alpine 10” Type-R Thin Powered Sealed Bass Package Includes one Alpine SWR-T10 10” thin subwoofer, one R-A75M amplifier, and sealed enclosure
Alpine SBR-S8-4 Ported enclosure with one 8" Type-R subwoofer at Crutchfield
2 Alpine Type R R-W12D4 12" Sub up Port Back Subwoofer Box Plans | CustomLowz
Alpine SWR-12D2 3000 Watt Type R Car Subwoofer + Vented Sub Enclosure Box | Audio Savings
Universal Car Stereo Slotted S Port Single 10" Alpine Bundle Type R R-W10D4 Sub Box Enclosure with Harmony HA-A800.1 Amplifier & 4GA Amp Kit - Walmart.com
Box I built a couple months back. Alpine type R 10” 1.5cf at 33hz : r/CarAV
Amazon.com: Alpine R-W12D4 Car Audio Type R Series Sub Dual 4 Ohm 2250W Peak 12" Subwoofer and HA-SWKD Dual Subwoofer Sub Box Install Kit : Electronics
2) Alpine Type-R R2-W12D4 12" 750w RMS Car Subwoofers+Vented Sub Box Enclosure - Walmart.com
Amazon.com: Universal Car Stereo Slotted S Port Single 12" Alpine R-W12D4 Type R Car Audio Subwoofer Custom Sub Box Enclosure Package New : Electronics
Alpine Audio 10" Type R & Type X Custom Aero Ported Box X-W10D4 R-W10D4 R-W10D2 | eBay
SBR-S8-4 - Alpine 8" Single Ported Enclosure Loaded with Type-R Subwoofer
Universal Car Stereo Vented Enclosure Single 12" Alpine R2-W12D4 Type – absoluteusa
Alpine R2-SB12V Single Type R2 12-in Subwoofer in Vented Enclosure - Creative Audio
Building a Ported Box for a 12" Alpine Type R - YouTube
Alpine 8" Type R Single Enclosure | P.C. Richard & Son
Alpine 8" Type R Single Enclosure | P.C. Richard & Son